Actually, it's not that weird, it just looks weird: "ceilidh," pronounced "kay-lay." Apparently, it's Scottish Gaelic for a "visit, informal social gathering, get-together, dance or party."
Cheers to many ceilidhs in your future and mine, kilts not necessarily required. However, wearing a kilt is on my bucket list; I hope to convince my son that we should wear them at his wedding one day to show our proud Scottish heritage. Did I mention his name is Mackenzie, which apparently means "son of the wise, great ruler?" It was my wife's name-choice. Honest. ;)